Year	Percent change
1980	14.945
1981	0.747
1982	-8.625
1983	-22.541
1984	6.158
1985	12.145
1986	4.419
1987	4.729
1988	-22.307
1989	20.487
1990	-7.9
1991	14.951
1992	19.312
1993	9.506
1994	10.103
1995	5.872
1996	10.775
1997	14.954
1998	5.395
1999	-4.776
2000	-9.926
2001	-4.753
2002	0.974
2003	-1.84
2004	12.042
2005	8.595
2006	4.972
2007	20.235
2008	15.69
2009	-15.215
2010	27.932
2011	29.715
2012	-3.182
2013	-1.465
2014	-1.993
2015	-1.534
2016	2.99
2017	4.909
2018	-0.421
2019	2.683
2020	7.538
2021	6.19
2022	5.722
2023	5.642
2024	5.638